Air control for oil burners



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H. s. BLAKE AIRl CONTROL FOR OIL BURNERS Filed A112. 4. 1926 f /7 e :Y INVENTOR.

A TTORNEYS.

3% j; WM M 25 of air and oil from the end of the tube.

Patented Feb. 21, 1928.

UNITED *STATES HAROLD S. BLAKE, OF ATTLEBORO, MASSACHUSETTS.

AIR CONTROL FOR OIL BURNERS.

Application led August 4, 1926. Serial No.'127,044.

This invention relates to an'improved apparatus for burning liquid fuel such as hydrocarbon oils; and has for its object to provide means for causing the air to move with great velocity along the inner surface of the air conduit until it is deflected at the discharge end with means for controlling the relative quantities of air along the upper and lower portions of the tube.

A further object is to locate a lire-deflectk ing device in a furnace and to direct a supply of air to the .deflector from a blower also to provide a fuel pipe having a jet opening adjacent the tube opening so that the air and the oil will 4mix and be ignited before being forced against' the deflector member, ymeans also being provided for controlling the direction of discharge of the fuel mixture so that the llame may be forced at a proper angle into the deflector.

A still further object. of the invention is the provision of a rockable valve seat in the air tube and a valve to cooperate with the seat whereby thevseat may be rocked or tipped to control the direction of discharge With these and other objects in view, the

. invention consists of certain novelfeatures GSU of construction, as will be more fully described, and particularly pointed out in the appended claims. f

In the accompanying drawings: y

'Figure 1 is a side elevation showing my improved apparatus.

Figure 2 is a plan view of the same.

, Figure .3 is an enlarged sectional elevation showing ythe air tube with the oil sup,- ply passing therethrough, a valve and the rocking valve seat. y Figure 4 is a sectional end view on line 4,4 of Figure 3.

Figure 5 is a fragmental side elevation showing the valve operating cam and the valve ring. y l

Figure 6 shows a fragmental portion of the air tube and showing the valve ring and the cam for rocking the ring on its pivotal axis for changing the directionof the flow of air to the tubeen-d. Y Y

Figure 7 is va rear view of the blower showing the oil pipe and its bushing. y

It is found in the practical operation of liquidvfuel burners of this character, of advantage to position the deflecting member in the firespot of a furnace for the purpose of controlling andv directing the heat from nace, it is necessary the burning flame; also .tov provide a tube having a discharge outlet adjacent this deflector, the opposite end of the'tube being connected with an air blower and through this tube I extend an oil pipe having a jetopening practically flush with the opening in the tube and the oil from the jet are caused to mix and be ignited and the flame forced against the deflector, and it is found in practice necessary to provide some means for controlling and directing` the llame to'impinge at the required angle against the deflect-ing member; and in order to accomplish this in a simple and effective way, I have provided a conical valve in the tube to ldeflect the lair and move it along the inner surface of the tube and have pivotally mounted a valve seat about the valve to be tipped or rocked relative tothe valve and so control the angle of the llame jet as it is projected against the def-lector. Inother where the draft is strong in the furthat the `jet be directed downwardlyY into the deflectorv in order to hold the fire therein, while under a lighter draft a less angle of the jet is required, that is theangle of the jet may be vregulated to suit the different conditions under which the apparatus is called upon to operate and the following is a detailed description of the present embodiment of my invention and showing one construction of mechanism' by which these advantageous results may be accomplished:y y Y.

With reference to the drawings,10 designates the deflector member which `isherein shown as being in somewhat of a pear or words,

-spoon shape and is secured in the fire-pot of a furnace 11. The air is conducted to this fire-pot by means of a tube 12 from a blower 13 driven by a motor 14.

The inner end of this tube is provided with a head member 15 with a reduced discharge opening 16 and through the center of this tube below the blades of the fan I vlead an oil supply pipe 17 from the supply tank 18, the inner end of this pipebeing provided with a jet nozzle 19 forl spraying the oil to mix withthe air, from the tube.

About this oil pipe 17 I have mounted a valve guide tube 20 which is supported on brackets 21 and on this uide tube Il have mounted an endways slidgable' conical valve 22 which is pressed towards ,lopen position by a spring 23.y l This valve 22 has' a conical the discharge tube, whereby the air fromV lll about the oil supply.

The nozzle is mounted in 'the tube '2O to be withdrawn endways therelrom 13 for inspection and repairs.

'Cooperating with this valve 1s a valve seat ring 24 which is `pivoted at 25 on its 'opposite sides to swing so as to control thc 'extent or' the valve opening'at its upperand llower portions. Y

-In order -to rock this val-ve ring, I have provided a cam pin 26 having an eccentric vpin 27engag1ng the ring 'so that when this pin is rotated it swings the seat on its fpivots 25 to lproduce unequal opei'iings'on theA top and bottom of the valve. 'In Vother words, when the ,ring is swung into position as illustrated in Figure 6, a 'wideropeir ing is Y'caused as at 28 on the under side of the valve and when swung to the opposite vposition a wider opening` lwill `be formed on the upper side oi the valve.

vWhen `it is desired owing to draft and other conditions in the furnace that the air and oil 'discharge shall be in a line with the axis of the tubeythe ringis held in a centra-l or vertical position and the amount of air to be discharged through Athe tube. iscontro'lled by the positioning of the cam 30. iIn'other words, more air is required this cam 3() Will be'rotated through its stem 3l 'to permit fthe valve to open wider under action ot its Spring 23 and if less air is required this cam 30 will be rotated back to morel 'nearly close the valve against its ring.r but when it is required `-to tip the jet which is projected from the endrof the tube downwardly. it is necessary -to operate the cam pin 26 to swing the valve ring and cause awider `opening on the upper side of the valve 22 which will cause the lair to pass along the upper surface of the tube and then down#V wardalong the inclined surface 32 whereby by its force will bend thel jet ot air and oil downwardly to throw the llame at the .propery anglefinto the defie'ctor, to obtain the most lly towards vthe -construction illustrated but I 'desire it to be understood that I reserve the privilege of resorting vto all the mechanical changes to which the device is susceptible,

out' through the bushed rear .end ot the blower the invention being defined and limited only by the terms-ot the appended claims. n

-I claim: Y

y l. In a liquid fuel burner, a fire deiiecting device located in the furnace, a blower, an air supply htube leading from the blow-erfand having a discharge opening adjacent said 'dcl'lecton a fuel supply jet adjacent the air discharge, and means `for selectively vdirecting the fuel Amixture 'discharge into the de- 4vHector through a vertical frange extending on both sidesot the axis ot the air tube.

2. vIn a liquid -fuel burner,-a tire delecti'ng 'device located in lthe furnace. a fblower, an

air supply tube leading from the 'blower'land having' -a discharge opening vadjacent said detlector, a fuel supply pipe extending through 'said tube 'and having a discharge "opening adjacentV 1that of the air tube, and,

means Acomprising 2a valve in the tube 'for inversely changing the iquantity of the air discharge above and below the -ax'is xvof lthe tube. j

'3. Ina liquid fuel burner, a -fi're delie'cting device located in the furnace.A Va' blower, an

air supplyy tube leading from ythe lblowerand havingl a discharge opening Vadjacent -said delector, a Afuel supply vpi-pe extending through said tube and having la discharge opening adjacent vthat of fthe air tube, a

.'ti-'ltable valve seat member in the tube, a

valve cooperating with "said seat, yand means for tilting'th'e seat relative to the valve.

4. Ina liquid Vfuel burner, la tube having a discharge open'ingin the furnace for lconducting air pressure thereint'd V'anfoil supply j'pipe extending Athrough the tribe *and :having a jet discharge adjacent saidairdis- "charge, a. 'pivotally mounted valve 'seat ring in said tube, a spring-pressed axially "movable valve cooperatingwith said seat, 'means for retaining 'said valve in predetermined open position, and means for L,'swin'giug'said valve seat with respectto-said valve.

y 5. Ina liquid fuel burner,a blower, a tube 'for conducting 'air'frornthe blower toa furnace, an 'oil supply 4having a vdischarging vnozzle adjacent the end of said air conducting tube, and vm'eansin said tube 4for directing a greater quantity of air above'or Abelow its axial center as desired.

6. In a liquid lfuel burner, a blower, a "tube for conducting air -from the blower to Ta furnace having a conically reduced discharging end, an oil supply having a dischargingnozzle adjacent vthe `end of said Vair Yconducting tube, and means ins'aid tube Tor directing'a greater quantity of air aboveo'r below its axial center 'as desired 'to permit of a deilection of the Hanne relative to 'the 'axis of thetube. i

loo

7. Ina liquid `fuel burner, a b'lowe'r,"a`tube for conducting air from 4the lblower "to 'a furna'c`ea n oil supply 'having a dischargingfnoz.- zle adjacent the Yend of'said air conducting Vable means cooperating with said valve Jfor controlling said assageway.

8. In a liquid uel burner, a blower, a tube for conducting air from the blower to a Jiurnace having a conically reduced discharging l end, an oil supply having a discharging nozzle adjacent the end of said air conducting tube, a conical outwardly flaring valve within said tube for deflect-ing the air outwardly to move along the inner surface of said tube with great velocity until it is deflected by the conical outer end of said tube, said conical valve being of a size and positioned to leve an annular passage between it and the tube, and separater adjustable means cooperating with said valve for controlling said passageway. Y

9. In a liquid fuel burner, a blower, a tube for conducting air from the blower to a furnace having a conically reduced discharging end, an oil supply having a discharging nozzle adjacent the end of said air conducting tube, a conical valve in said tube for defiecting the air outwardly to move along the inner surface of said tube with great velocity until it is deflected by the outer conical end of said tube, a valve seat ring adjacent said valve, means to pivotally mount said ring, and means to move the ring about its pivot to vary the relative quantities of air passing along the upper and lower side of said tube.

10. In a liquid fuel burner, a blower, a tube for conducting air from the blower to a furnace having a conically reduced discharging end, a conical valve in said tube for defleeting the air outwardly to move along the inner surface of said tube with great velocity until it is defiected by the outer conical end of said tube, a valve seat ring adjacent said valve, means to pivotally mount said ring,

means to move the ring about its pivot to vary the relative quantities of air passing along the upper and lower side of said tube, and means to adjust said valve bodily relative to its valve seat. v Y

In testimony whereof I atlix my signature.

HAROLD S. BLAKE. 

